Skytrac CDP-300 - Page 19

CDP-300 User’s Guide
Document Rev. 01.008 DOC0500 Page 19 of 42
Restricted Proprietary and Confidential Information
This method only functions if the dimmer bus has been wired to the CDP.
The exception is when the voltage falls below a configured minimum threshold, and the optical sensor indicates a
bright cabin, then the backlights and LEDs will be set to maximum brightness. This feature ensures that during
bright daylight when the dimmer bus is off, the Display and indicators are at their maximum brightness.
The threshold at which this occurs can be configured at the “Dimmer Threshold” menu option. Setting the Dimmer
Threshold to 0 disables the daylight mode behaviour, and this may be desirable for certain conditions. The user
can also vary the relative ambient brightness required to trigger a daylight response via the “Daylight Threshold”
menu option.
4.4.2.3 MANUAL ADJUST
Manual Adjust overrides any previously selected automatic modes (Optical Sensor Mode or Dimmer Bus). It
allows the user to manually adjust the brightness to one of 15 levels. This setting will persist in the system until
the next factory reset or until the setting is changed again, to one of the automatic modes or different manual
setting.
4.4.2.4 DIMMER EXT RNG MODE (NOT AVAILABLE IN STANDALONE MODE OR WITH FIRMWARE
VERSION 5.X)
The Dimmer Ext Rng Mode or extended dimmer bus mode allows the dimmer bus input to the CDP to make the
display brighter at the top end of the dimmer bus range and dimmer at the low end of the dimmer bus range. This
is useful for night vision equipment users who may need the display to go dimmer than the dimmer bus mode.
Note: The extended range dimmer bus mode must first be enabled using the CDP/DVI configuration menu:
System Setup  Extended Dimmer Bus Cfg Enable Ext Dim Bus.
By default, use of the extended dimmer bus mode is not enabled and the option is not presented to users. The
effect of enabling adds the extended dimmer bus mode as an option in the brightness menu.
If the dimmer bus is not physically wired in a given installation, selection of the extended dimmer bus mode may
leave the display off (0 volts on the dimmer bus input pin). The configuration option prevents users from selecting
the extended dimmer bus mode when a dimmer bus has not been connected.
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